IRGC says it fired ballistic missiles at US aircraft carrier and destroyer as standoff intensifies in Strait of Hormuz.
At least six other people were injured in the tanker blast on Iran's Hamedan-Sanandaj highway, officials say.
US Central Command says its forces struck three Iranian crude oil carriers on Saturday.
The strikes come a day after President Trump appeared to downplay the war with Iran as "small potatoes" during an exchange with reporters in the Oval Office.
US strikes have hit Iranian oil tankers in the Gulf of Oman and near Iran’s Kharg island.
US Central Command says the attacks came after Iran launched ballistic missiles at two of its Navy warships.
Amid rising public discontent, Iranian authorities say adversaries are focused on encouraging domestic unrest.
As oil tanker struck off Kharg island, Trump threatens one of the remaining parts of Iran’s nuclear complex.
Iranian tanker hit by US attack near Iran's Kharg Island, Tasnim says reuters.com
US President Donald Trump has repeated an earlier warning that the US may attack Iran's Pickaxe Mountain "very soon".
Trump tells reporters the US is 'not fighting right now' despite a recent exchange of fire with Iran.
EXCLUSIVE: US intelligence says Iran government is not at risk of collapse, say sources Reuters